ARL-MR-569 - A Two-Dimensional Meteorological Computer Model for the Forest...

A Two-Dimensional Meteorological Computer Model for the Forest Canopy

Report No.

ARL-MR-569

Authors:

Arnold Tunick

Date/Pages:

August 2003; 30 pages

Abstract:

This report presents the equation set, modeling assumptions, and some initial results from a new, physics-based computer model that is being
developed for two-dimensional forest canopy wind flow, temperature, and turbulence calculations. The model is based on the conservation
(simplified Navier-Stokes) equations for continuity, momentum, Reynolds stress, energy, heat flux, and turbulent temperature variance. A set
of simultaneous equations for each of 12 computed variables is solved iteratively on a computational grid consisting of 10 ? 60 points.
Horizontal grid spacing is 50 m, and vertical grid spacing is 0.5 m. The model domain is 500 ? 30 m. It is anticipated that improved
turbulence and micrometeorological models for forest canopies will become increasingly useful for military acoustic application research.